Yamaha 2006 YZ85 Service Manual

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INSP
ADJ
ELECTRICAL/SPARK PLUG INSPECTION
EC370000
ELECTRICAL
EC371001
SPARK PLUG INSPECTION
1. Remove:
●
Spark plug
2. Inspect:
●
Electrode 1
Wear/damage → Replace.
●
Insulator color 2
Normal condition is a medium to light tan
color.
Distinctly different color → Check the
engine condition.
NOTE:
When the engine runs for many hours at low
speeds, the spark plug insulator will become
sooty, even if the engine and carburetor are in
good operating condition.
3. Measure:
●
Plug gap a
Use a wire gauge or thickness gauge.
Out of specification → Regap.
4. Clean the plug with a spark plug cleaner if
necessary.
Spark plug gap:
0.5 ~ 0.6 mm (0.020 ~ 0.024 in)
5PA30850
5. Tighten:
●
Spark plug
NOTE:
●
Before installing a spark plug, clean the gas-
ket surface and plug surface.
●
Finger-tighten a the spark plug before torqu-
ing to specification b.
5PA30860
T
R
.
.
20 Nm (2.0 m · kg, 1.4 ft · lb)

Yamaha 2006 YZ85 Specifications

General

Displacement	84.7 cc
Ignition	CDI
Transmission	6-speed, constant mesh
Final Drive	Chain
Front Tire	70/100-17
Rear Tire	90/100-14
Engine Type	Liquid-cooled, 2-stroke, single
Bore x Stroke	47.5mm x 47.8mm
Front Suspension	Inverted telescopic fork
Front Brake	Hydraulic single disc
Rear Brake	Hydraulic single disc
Width	735 mm
Dry Weight	66kg (145 lbs)